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Hunting-Based Optimization Technique for Secured Optimal Power Flow with Lines Outages in Power System 基于狩猎的优化技术,确保电力系统中线路停电时的最佳电力流
Q3 Engineering Pub Date : 2024-03-27 DOI: 10.37394/232016.2024.19.10
I. Ziane, F. Benhamida, D. Gozim
This paper aims to achieve the exact resolution of an optimal power flow (OPF) problem in an electrical network. In the OPF, the goal is to plan the production and distribution of electrical power flows to cover, at minimal fuel cost, the consumption at various points in the network. Three variants of the OPF problem are studied in this manuscript. The first one, OPF corresponds to the case where power production costs in the network are modeled with a quadratic cost. In the second variant, OPF with outages of some lines, we clarify the extent to which power flow is affected by the outages and the increasing number of overloaded lines. Finally, the last variant, secured OPF corresponds to the case where the management of production units can respect the power limit of each line by rescheduling power production units. The study focuses on congestion management in the IEEE 30 bus system by applying a model for OPF, incorporating data from both transmission lines and generators. The research proposes a Hunting Optimization Technique which is named “Multi-Objective Ant Lion Optimizer (MOALO)” to solve single and multi-objective optimization problems to find a solution for management pricing, comparing results with other research methods to show the effectiveness of the applied approach and the mathematical model representing congestion management.
本文旨在精确解决电网中的最优电力流(OPF)问题。在 OPF 中,目标是规划电力流的生产和分配,以最小的燃料成本满足网络中各点的消耗。本手稿研究了 OPF 问题的三个变体。第一种,OPF 对应于网络中的电力生产成本以二次成本建模的情况。在第二种变体,即部分线路停电的 OPF 中,我们明确了停电和过载线路数量增加对电力流的影响程度。最后,最后一个变体,即有保障的 OPF,对应的情况是生产单位的管理可以通过重新安排电力生产单位来尊重每条线路的功率限制。研究重点是通过应用 OPF 模型,结合输电线路和发电机的数据,对 IEEE 30 总线系统进行拥塞管理。研究提出了一种名为 "多目标蚁狮优化器(MOALO)"的狩猎优化技术,用于解决单目标和多目标优化问题,以找到管理定价的解决方案,并将结果与其他研究方法进行比较,以显示所应用的方法和表示拥塞管理的数学模型的有效性。
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引用次数: 0
Wind Energy Conversion System with Integrated Power Smoothing Capability based on an EVT-coupled Flywheel 基于 EVT 耦合飞轮的具有集成功率平滑功能的风能转换系统
Q3 Engineering Pub Date : 2024-03-27 DOI: 10.37394/232016.2024.19.9
M. Cendoya, S. Verne, M. Valla, P. E. Battaiotto
This paper presents a wind energy conversion system that integrates, in a compact form, both generation and power smoothing functions. The system is based on a vertical axis wind turbine (VAWT) and a low-speed flywheel that are coupled by an electric variable transmission (EVT). The EVT performs a dual function by simultaneously injecting power to the grid and regulating the power flow to the flywheel to smooth the power fluctuation caused by wind turbulences. The main advantages of the presented generation/smoothing topology are integrating two machines (generator and motor) in the same physical structure and the reduced power demanded by the converter that feeds the flywheel’s rotor. A theoretical analysis is carried out to determine an appropriate control law and flywheel sizing to satisfy a desired attenuation of the power fluctuation. Simulation results show an effective smoothing action, as the power fluctuation is reduced to an adequate level. In addition, the validity of the flywheel sizing procedure is verified.
本文介绍了一种风能转换系统,该系统结构紧凑,集成了发电和功率平滑功能。该系统以垂直轴风力涡轮机(VAWT)和低速飞轮为基础,并通过电动可变变速器(EVT)耦合。电动变速器具有双重功能,既能向电网注入电力,又能调节飞轮的功率流,以平滑风湍流引起的功率波动。所提出的发电/平滑拓扑结构的主要优点是在同一物理结构中集成了两台机器(发电机和电动机),并降低了为飞轮转子供电的变流器所需的功率。通过理论分析,确定了适当的控制法则和飞轮尺寸,以满足所需的功率波动衰减。模拟结果表明,由于功率波动降低到了适当的水平,因此平滑作用非常有效。此外,飞轮选型程序的有效性也得到了验证。
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引用次数: 0
Quantification of Uncertainty Cost Functions for Controllable Solar Power Modeling 量化可控太阳能发电建模的不确定性成本函数
Q3 Engineering Pub Date : 2024-03-27 DOI: 10.37394/232016.2024.19.11
Sergio Raul Rivera Rodriguez, A. Al‐Sumaiti, Tareefa S. Alsumaiti
Navigating the secheduling of generation resources of energy in power systems marked by a significant presence of renewable generation involves intricate optimization challenges. The conventional tools for resolving such challenges include programming techniques and heuristic approaches, both contingent upon a precisely articulated target function for optimization. Traditional optimization tools rely on precisely defined target functions, but the evolving landscape of power systems introduces complexity, especially with unpredictable behaviors of renewable sources. The research specifically quantifies penalty costs associated with photovoltaic (PV) generators, employing probabilistic methods for a robust mathematical analysis. The developed analytical model enhances adaptability in economic dispatch problems, considering uncertainty in decision-making. Validation using Monte Carlo simulation emphasizes uncertainty in PV generation and highlights the advantages of the proposed analytic model. The quadratic form of the model aligns coherently with simulation outcomes, contributing significantly to understanding uncertainty quantification in solar power modeling. The research aims to refine controllable solar power models, establish robust uncertainty cost functions, and improve the accuracy of economic dispatch strategies. Ultimately, this work promotes the seamless integration of solar energy into diverse and dynamic energy grids.
在以大量使用可再生能源发电为特点的电力系统中,如何对发电资源进行优化调度是一项复杂的挑战。解决此类挑战的传统工具包括编程技术和启发式方法,这两种方法都以精确定义的优化目标函数为前提。传统的优化工具依赖于精确定义的目标函数,但电力系统的不断变化带来了复杂性,尤其是可再生能源不可预测的行为。本研究采用概率方法进行稳健的数学分析,具体量化了与光伏(PV)发电机相关的惩罚成本。考虑到决策中的不确定性,所开发的分析模型提高了经济调度问题的适应性。利用蒙特卡罗模拟进行的验证强调了光伏发电的不确定性,并突出了所提出的分析模型的优势。该模型的二次方形式与模拟结果一致,极大地促进了对太阳能发电建模中不确定性量化的理解。该研究旨在完善可控太阳能发电模型,建立稳健的不确定性成本函数,并提高经济调度策略的准确性。最终,这项工作将促进太阳能与多样化动态能源网的无缝整合。
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引用次数: 0
Grid-connected Systems Powered by Solar Energy Implemented with Fuzzy based Voltage Source Converters 利用模糊电压源转换器实现太阳能供电的并网系统
Q3 Engineering Pub Date : 2024-03-12 DOI: 10.37394/232016.2024.19.8
Raja Sathish Kumar, Y. V. B. K. Rao, Venkata Koteswara Rao N.
Solar energy systems connected to the electrical grid are known as grid-tied solar power systems or solar power-connected grid systems. Grid-tied solar inverters are only capable of producing active electricity since they are made to produce power at a unity power factor. The grid alone can meet the load’s requirement for reactive power. Reactive power drawn from the grid relative to active power has increased significantly with the sharp rise in the deployment of distributed energy resources based on renewable energy. This has an impact on the grid’s power quality. The amount of reactive power that the grid must supply will decrease if the grid-tied solar inverter is designed to be intelligent enough to provide reactive power in addition to active power. This work’s primary goal is to generate the necessary pulses for a three-phase inverter, which will aid in producing reactive power and ultimately help achieve the work’s primary objective. Fuzzy logic is a complex approach that takes advantage of the flexibility and adaptability of fuzzy systems to manage Voltage Source Converters (VSCs) for three-phase inverter operation. The primary circuit is simulated in the MATLAB/Simulink environment, giving the desired results.
与电网连接的太阳能系统被称为并网太阳能系统或太阳能并网系统。并网太阳能逆变器只能生产有功电能,因为它们是以统一功率因数发电的。只有电网可以满足负载对无功功率的要求。随着基于可再生能源的分布式能源部署的急剧增加,从电网汲取的无功功率相对于有功功率大幅增加。这对电网的电能质量产生了影响。如果并网太阳能逆变器设计得足够智能,能够在提供有功功率的同时提供无功功率,那么电网必须提供的无功功率就会减少。这项工作的主要目标是为三相逆变器生成必要的脉冲,这将有助于产生无功功率,并最终帮助实现工作的主要目标。模糊逻辑是一种复杂的方法,它利用模糊系统的灵活性和适应性来管理电压源转换器(VSC),以实现三相逆变器的运行。主要电路在 MATLAB/Simulink 环境中进行了仿真,得出了预期结果。
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引用次数: 0
Design and Analysis of a Low Voltage Simulink Model (LVSM) of IEEE 57 Bus IEEE 57 总线低电压仿真模型 (LVSM) 的设计与分析
Q3 Engineering Pub Date : 2024-03-12 DOI: 10.37394/232016.2024.19.5
G. V. B. Chary, Raghavaiah Katuri, K. Rosalina
The present power system is gaining momentum towards designing equivalent circuit models. The Ward and REI methods involve the admittance reduction method as well as being merged with the EMS model to derive boundary parameters, but these methods are limited and valid for a predefined condition. Therefore, it is required to design an equivalent circuit that adopts the real power system for analysis. In this paper, a new method is proposed to design a scaled-down power system model without changing the impedance of components. In this regard, a Low Voltage Simulink Model (LVSM) of the IEEE 57 bus network was designed in MATLAB/ Simulink so that it could be useful for laboratory model design purposes. The main objectives of this paper are to propose a mathematical procedure to scale down the network parameters and design a 3-phase LVSM of an IEEE 57 bus power system network within the Simulink platform. The performance of LVSM was analyzed with no-load, balanced load, and unbalanced load models. These simulation studies were validated and compared with the theoretical results to prove that the proposed LVSM modeling has good mathematical accuracy, robustness, and validity for practical model implementation.
目前的电力系统正日益倾向于设计等效电路模型。Ward 和 REI 方法涉及降低导纳的方法,以及与 EMS 模型合并以推导边界参数的方法,但这些方法都有局限性,且只对预定条件有效。因此,需要设计一种采用真实电力系统的等效电路来进行分析。本文提出了一种新方法,在不改变元件阻抗的情况下设计一个缩小的电力系统模型。为此,本文在 MATLAB/ Simulink 中设计了 IEEE 57 总线网络的低电压 Simulink 模型 (LVSM),以便用于实验室模型设计。本文的主要目的是在 Simulink 平台上,提出一种缩减网络参数的数学方法,并设计出 IEEE 57 总线电力系统网络的三相低压仿真模型。通过空载、平衡负载和不平衡负载模型分析了 LVSM 的性能。这些仿真研究得到了验证,并与理论结果进行了比较,证明所提出的 LVSM 建模具有良好的数学准确性、鲁棒性和实用性。
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引用次数: 0
Simplified Approach for Wind Uncertainty Cost Functions using a Mixture of Uniform Probability Distribution 使用均匀概率分布混合物计算风能不确定性成本函数的简化方法
Q3 Engineering Pub Date : 2024-03-12 DOI: 10.37394/232016.2024.19.7
Libardo Acero García, Muhammad Atiq Ur Rehman, Sergio Raul Rivera Rodriguez
Wind energy generation is an individual source of energy considered in renewable energy resources. It is completely dependent on the natural process of air blown in the area or past forecasting of air blown data. It is considered an uncertain source of energy and less reliable in the context of real-time energy provisions. To make this wind energy more reliable and consistent, we are introducing a simplified approach for wind uncertainty cost functions based on uniform probability distributions and its evaluation for usage. We have developed analytical mathematics cost functions based on several assumptions and they are constructed using Weibull and Rayleigh probability distributions. The proposed method produces the required results to make this energy reliable and consistent with the distribution networks. Computing time and complexity are less as compared to the other methods to minimize the uncertainty of wind energy.
风能发电是可再生能源中的一种独立能源。它完全依赖于该地区的自然吹风过程或过去的吹风数据预测。它被认为是一种不确定的能源,在实时能源供应方面不太可靠。为了使风能更可靠、更稳定,我们引入了一种基于均匀概率分布的风能不确定性成本函数简化方法及其使用评估。我们基于若干假设开发了分析数学成本函数,并使用 Weibull 和 Rayleigh 概率分布构建这些函数。所提出的方法能产生所需的结果,使这种能源可靠并与配电网络保持一致。与其他方法相比,计算时间和复杂性都更少,可最大限度地减少风能的不确定性。
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引用次数: 0
Effect of DC Link Capacitor on the Performance of Wind-Driven Double-Fed Induction Generator 直流链路电容器对风驱双馈感应发电机性能的影响
Q3 Engineering Pub Date : 2024-03-12 DOI: 10.37394/232016.2024.19.6
Sanaa M. I. Amer, M. Eskander
In this paper, the starting performance of a double-fed induction generator (DFIG) operating at super-synchronous speed is investigated when varying the values of the DC link capacitor. The starting transients, the settling time, and the harmonics of the stator and rotor currents and voltages are investigated as a function of the DC link capacitor Cd. Curve fitting is applied to derive mathematical equations (polynomial) relating the variation of the stator current THD with the value of the DC capacitor. Similarly, polynomials are deduced to relate the THD of the rotor current and rotor voltage with the value of the DC link capacitor. These polynomials help to design the DC link parameters that lead to minimum current and voltage harmonics of the grid-connected DFIG. The minimum THD values of the stator current, rotor current, and rotor voltage are presented. These results are repeated at different rotor speeds to deduce the optimum Cd value within a wide speed range. Also, the effect of Cd on the DC link current and voltage ripples is demonstrated at different speeds.
本文研究了在超同步转速下运行的双馈感应发电机 (DFIG) 在改变直流链路电容器值时的启动性能。研究了启动瞬态、稳定时间以及定子和转子电流和电压的谐波与直流链路电容器 Cd 的函数关系。通过曲线拟合,得出了定子电流 THD 变化与直流电容器值之间的数学方程(多项式)。同样,还可推导出多项式,将转子电流和转子电压的总谐波失真与直流链路电容器的值联系起来。这些多项式有助于设计直流链路参数,使并网直流风力发电机的电流和电压谐波最小,并给出了定子电流、转子电流和转子电压的最小总谐波失真(THD)值。这些结果在不同的转子转速下重复出现,从而推导出在较宽转速范围内的最佳 Cd 值。此外,还展示了不同转速下 Cd 对直流链路电流和电压纹波的影响。
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引用次数: 0
Enhancing Condition Monitoring with Virtual Reality Visualization for Industrial Application 利用虚拟现实可视化技术加强工业应用中的状态监测
Q3 Engineering Pub Date : 2024-03-06 DOI: 10.37394/232016.2024.19.4
Ali Mohammed Ridha, Wessam Shehieb
Monitoring the machines' health in an industrial setting is crucial to maintaining the workflow without disturbance. There are multiple methods commonly used for this purpose that go under conditional monitoring. Conventional conditional monitoring can be time-consuming and difficult to interpret by a non-experienced operator, which increases the risks in such critical applications. Virtual Reality (VR) has been in use for multiple applications to ease the usage of complex tasks via proper visualization. In this paper, a visualization approach of industrial application that monitors the motor’s health connected with a vibration sensor via a programmable logic controller (PLC) is presented. The Beckhoff PLC was programmed using TwinCAT 3 software and linked with Unity VR headsets via MQTT protocol. The user is given the ability to select the number of connected sensors and place them to mimic the actual environment, import their own 3D machine design, test for MQTT broker connectivity, and visualize the machine's health as per the ISO 10826-3 standard. The proposed system has been tested successfully and it is expected to ease visualization in an industrial setup.
在工业环境中,监控机器的健康状况对于保持工作流程不受干扰至关重要。为此,条件监控通常采用多种方法。传统的条件监控既费时,又难以被没有经验的操作员解读,从而增加了此类关键应用中的风险。虚拟现实(VR)已在多种应用中使用,通过适当的可视化来简化复杂任务的使用。本文介绍了一种工业应用的可视化方法,该方法通过可编程逻辑控制器(PLC)监控与振动传感器相连的电机的健康状况。Beckhoff PLC 使用 TwinCAT 3 软件编程,并通过 MQTT 协议与 Unity VR 头显连接。用户可以根据 ISO 10826-3 标准选择所连接传感器的数量和位置以模拟实际环境、导入自己的三维机器设计、测试 MQTT 代理连接性并可视化机器的健康状况。所提议的系统已成功通过测试,有望简化工业设置中的可视化工作。
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引用次数: 0
Enhancement of Field Oriented Control for Permanent Magnetic Synchronous Motor using Ant Colony Optimization 利用蚁群优化增强永磁同步电机的场定向控制
Q3 Engineering Pub Date : 2024-03-01 DOI: 10.37394/232016.2024.19.3
Meriem Megrini, Ahmed Gaga, Y. Mehdaoui
Because of its frequent use in diverse systems, the PMSM drive must be controlled. Field-oriented control (FOC) based PMSM drive is modeled in the present work to optimize the torque and speed performance of the PMSM. The FOC is based on a dissociated speed and flux control approach, which controls the speed and flux of the PMSM independently. The standard Proportional Integrator Derivative (PID) controller regulates the speed in FOC, which is noted for its increased resilience in linear systems, however in nonlinear ones, the PID controller responds poorly to changes in the system’s variables. In this case, the best solutions are frequently based on optimization techniques that produce the controller’s gains in every period. Optimizing the PID’s behavior in response to the system’s nonlinear behavior. The novel proposed strategy for enhancing the gains of the PID controller by employing a cost function such as Integral Time Absolute Error (ITAE) is based on PID speed regulation and is optimized using the Ant Colony Optimization algorithm (ACO) for FOC. To confirm the strategy’s aims, the suggested method is implemented on Matlab/Simulink. The simulation results demonstrated the efficiency of the intelligent ACO-FOC control, which delivers good performance in terms of stability, rapidity, and torque fluctuations.
由于 PMSM 驱动器在各种系统中的频繁使用,因此必须对其进行控制。本研究建立了基于面向场控制(FOC)的 PMSM 驱动器模型,以优化 PMSM 的转矩和速度性能。FOC 基于分离的速度和磁通控制方法,可独立控制 PMSM 的速度和磁通。FOC 采用标准的比例积分微分(PID)控制器来调节速度,该控制器因其在线性系统中的适应性更强而备受关注,但在非线性系统中,PID 控制器对系统变量变化的响应较差。在这种情况下,最佳解决方案往往是基于优化技术,使控制器在每个周期都能获得增益。针对系统的非线性行为优化 PID 行为。通过使用成本函数(如积分时间绝对误差 (ITAE))来提高 PID 控制器增益的新策略是以 PID 速度调节为基础,并使用针对 FOC 的蚁群优化算法 (ACO) 进行优化。为了证实该策略的目标,建议的方法在 Matlab/Simulink 上进行了实施。仿真结果表明了智能 ACO-FOC 控制的效率,它在稳定性、快速性和扭矩波动方面都表现出色。
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引用次数: 0
Comparing Methods to Mitigate the Effect of Grid Voltage Sag and Frequency Variation on the Operation of Variable Speed Drives 比较缓解电网电压波动和频率变化对变速驱动器运行影响的方法
Q3 Engineering Pub Date : 2024-03-01 DOI: 10.37394/232016.2024.19.2
Mohamed Ibrahim, M. Nashed, M. Eskander
In this paper, the effect of unsymmetrical grid voltage sag on the performance of a slip power recovery drive is studied, and two strategies to mitigate its effects are investigated. The first strategy consists of three phase parallel RL impedance connected to the rotor circuit. The second strategy consists of three phase LCL filter connected to the rotor circuit. A PI controller is tuned to test the drive at constant speed. Also, the effect of grid frequency drop on the drive performance is investigated with the same two protection strategies. The proposed systems are modeled with Matlab/Simulink and the simulation results are compared. The drive performance without any protection schemes are compared with its performance with the two proposed strategies. The compared results include the stator voltage and current, the rotor voltage and current, the DC link voltage and current, the electric torque, and the rotor speed.
本文研究了非对称电网电压骤降对滑差功率恢复驱动器性能的影响,并探讨了减轻其影响的两种策略。第一种策略包括与转子电路相连的三相并联 RL 阻抗。第二种策略包括与转子电路相连的三相 LCL 滤波器。对 PI 控制器进行了调整,以测试恒速驱动。此外,还使用同样的两种保护策略研究了电网频率下降对驱动器性能的影响。提议的系统使用 Matlab/Simulink 建模,并对仿真结果进行了比较。将未采用任何保护方案的驱动器性能与采用两种建议策略的驱动器性能进行了比较。比较结果包括定子电压和电流、转子电压和电流、直流链路电压和电流、电动扭矩和转子速度。
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引用次数: 0
期刊
WSEAS Transactions on Power Systems
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